Concrete-form



C. G. MIESS AND L J. McKAY.

CONCRETE FORM APPLICATION FILED AUGhZO, 1920.

1,397, 138, Patented Nov. 115, 1921.-.

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CHARLES G. MIESS AND JOHN J. MCKAY, 0F SALAMANCA, NEW YORK.

CONCRETE-FORM.

bled, and can be accurately positioned both with respect to the structure to be formed and the structure already formed.

Another object is the provision of a form which is capable of being easily adapted to the building of a large variety of structures of different configurations with the use of a minimum number of parts.

A further object is to provide a form which in its relation to the structure being built, and'the manner of detaching it therefrom, results in the minimum disturbance of the surface of the concrete, plaster or cement.

The invention in general comprises metallic plates, preferably smooth, which are provided on one side with suitable reinforcing elements, giving the form rigidity and .a smooth contacting surface with the material being formed. Adjusting means are provided whereby a plurality of these plates may be accurately spaced to present the desired interior dimensions for the structure with the use of a minimum number of parts. The various detail features of the invention will. be clearly apparent from a consideration of the following description and claims when read in connection with the accompanying drawings. 1

The invention is illustrated in the drawings, of which Figure 1 represents a vertical section through a concrete structure or building, showing a concrete form positioned thereon ready for the building of a new structure thereto; 1

- Fig. 2 represents an elevation of one of the plates;

" Fig. 3 represents the way in whicha corner section may beformed; i

Fig. 4 is an elevation of a corner section; Fig. 5 is an enlarged view of one of the adj ting devices; I

. Specification of Letters Patent.

' Application filed August 20, 1920. Serial No. 404,730.

Fig. 6 represents the use of a single adjusting means for holding a plurality of plates for separate structures together; and

Fig. 7 illustrates theway in which the structure'of itself becomes separated from the plates.

As shown in the drawings, each form comprises a metallic plate 1 which on one side is preferably smooth and on the other side is reinforced by any suitable metallic member, such as T bars 2, whichmay be disposed on the rear portion in any desired manner to give the required rigidity. The plate 1 and the reinforcing element 2 may be connected together in any suitable manner. At a suitable number of points, where the T. bars 2 intersect each other, apertures, such as 3, are formed through the T bars and the plate 1. The apertures in the plates which are used on the outside of any'particular structure are smooth and tapered, whereas the apertures to be used on the inside of any particular wall or structure are threaded and have straight parallel sides. As seen in Fig. 1, a tapered bolt 4, having a head '5 and a screw-threaded portion 6, is adapted to be inserted in the above-mentioned apertures.

The head 5 of the bolt 4} bears against a T bar on the outside plate 7, and the diameter of the aperture in this plate; is made to conform to the diameter of the tapered portion adjacent the head 5, so that the plate 7 will snugly rest against thehead 5. On the other hand, the aperture in plate 8 is threaded to engage with the threaded portion 6 of the bolt, and, when the bolt is threaded thereon, is, therefore, accurately spaced from the plate 7 to provide an open space between the plates of the required dimensions. It will be noticed that on each form there is, around the periphery of the plates, a definite distance between the T bars and the rim of each plate. This rim is suitably reinforced by fiat strips of metal .9. This spacing is provided so that whenthe bolts 4 are insorted through the apertures between the plates, 'andthe form thus made is mounted on the top of the structure already built, such as 10 shown in Fig. 1, the lower portion of the concrete form will overlap the upper end of the previously built-up section, resulting in a tight joint and insuring a firm union between the abutting edges of the two structures.

It will be readily observed that the dimension and slope of the taper on the bolts 4;.

can be accurately made so that in relation to apertures in each plate of definite dimensions, the plates will be definitely and positively spaced with respect to each other merely by sliding them in position on the bers may be connected rigidly together by being riveted to a plate 12 extending therebetween.

It willbe readily'apparent that plates of this general construction can be made in a variety of shapesand sizes, so that forms to suit various needs of the builder can readily be assembled.

In Fig. 3, the manner of constructing the corner form is shown. A plurality of plates, such as 1, are arranged at right angles to each-other and spliced by bolts 4. It will be'observed" that the outer'edgesof-the respective cornerplates on each side of the corner lie in a straightline which extends parallel to the direction of the other face pf the corner. This provides a corner form to p which plates ofuniform size can berea'dily inside wall of the structure.

related to continue the structure in either dlrection. In order to firmly unite the corner plates 1 together at their contacting edges, L-shaped anglebars 13 can be placed adjacent the contacting edges of the plate and riveted thereto, as shownin Fig. 3.

In Fig. 6 a bolt 14 of the type above mentioned is shown adapted to" position four plates thereon to form two walls suitably positioned with respect to each other.

In Fig. 7 is shown the contraction of the wall whereby the wall becomes slightly separated-from the forms which are rigidly held by the adjusting bolt 14. This resultant action ofthefmaterial adds to the fa cility with which the form can be removed from the structure after the material has set.

In the operation of the device, the plates 1 are placedon edge in the position where the structure. is to be built, and the bolts 4 are passed through the proper apertures, the

outer endsof these bolts screwing into the threaded. apertures in the plates formingthe shaped facing members are then placed over the plates 1 andconcrete is poured into the form in any suitable manner and by any suitable mechanism. After the form has been 'filledand the concrete has set,'the concrete by contracting separates slightly from the form. To remove the form, the bolts 4 are turned'to unscrew their outer'ends The top U- from the above-mentioned apertures, whereupon they are. readily removedby reason of the taper without injury to the structure.

In the event that it is desired to add a section of wall on top of another section which has already been built, the forms are arranged as shown in Fig. 1, with the lower portion of the form overlapping the upper end of the structure already built, to provide a tight joint, the bolts 4 resting on'the top of the previously built structure.

It will be apparent from a consideration of this description, taken in connectionwith the drawings, that we have provided a simple and readily assembled and disassembled form which is adaptable to build a variety of structures with a minimum amount of labor and with a resultant product which is produced in a-very short time.

e claim:

1. A concrete form comprising spaced plates, there being holes in said plates, the holes in one plate having larger transverse dimensions than the holesin another-plate and a metal bolt correlatedto the exact sizes of the various holes in'the respective plates extending through said plates, for holding the plates in spaced relation and preventing movement relative to each other.-

2. A concrete form according to claim 1 in which the holes and bolt are tapered.

3. A concrete form comprising, in combination, a plurality of pairs of metallic plates, each pair of plates separated by a predetermined space,'metal bars for rigidly supporting each of said plates, a plurality of tapered holes in all of said plates, the innermost plate being also threaded to engage a fastening key'bolt, and tapered key bolts with threaded ends and of sufiicien't length to engage the threaded hole of the innermost plate and also retain the pairs of plates in the predetermined spaced relation to each other. f

4. A concrete form comprising, in combination, a plurality of metallic plates, metal bars for rigidly supporting said plates, there being tapered holes in all of said metallic-plates for-the reception of a positioning and securing; means, said means comprising a tapered'bolt with a threaded end, the taper at points spaced therealong on said bolt corresponding exactly to the diameters ofthe tapered holes,

and the threaded end ofthe bolt engaging the holes ofthe insideplates, theholes of the'last named plates being threaded to engage the threaded end of the bolt.

5. A concrete "form comprising a tapered bolt having a head, an apertured plate positioned on said bolt adjacent thehea-dand a second plate having an aperture of a smaller dimension than the first mentioned plate also positioned'on said bolt, thetwo plates separated by a predetermined space,

the space being determined by the taper at a point spaced therealong on said bolt corresponding exactly to the size of the apertures in the respective plates.

6. A concrete form comprising a tapered bolt having a head, an apertured plate p0- sitioned on said bolt adjacent the head, a second apertured plate positioned on said bolt, a third apertured plate positioned on said bolt, and a fourth apertured plate also positioned on said bolt, the aperture in the first named plate being larger than that of the second named plate, the aperture in the second named plate being larger than the aperture in the third named plate, and the aperture in the third named plate being larger than the last named plate, each plate separated from each other by a predetermined space, the spaces intervening between the respective plates being determined by the cross-section of the taper at points spaced therealong on said bolt corresponding exactly to the internal dimensions of the apertures in the respective plates.

7. A concrete form according to claim 6 in which the apertures in the first, second and third plates are tapered.

8. A concrete form according to claim 6 in Which the end of the bolt is threaded as is also the aperture of the fourth plate.

CHAS. G. MIESS. JOHN J. MQKAY. 

